If you decide to sell your altcoins, also consider the possible risks and costs associated with such transactions, including exchange fees, currency conversion fees, and potential loss of value due to price volatility. Before making an investment decision, it is best to consult a registered broker or financial advisor or seek advice from someone who has sufficient knowledge and experience in this area.
If people actually did that and they consulted with an experimented trader or investor then we could avoid most of the tragic scenarios we get to know almost every day in this forum, because no investor which has a high level of experience will waste their time investing in the thousands of useless altcoins that are released each year, for newbies it is better to concentrate on bitcoin and only on bitcoin as it is impossible for them to distinguish a good project from a bad one, and the case of the OP is just an additional example of this idea being true.